H=6cm(height of the object)
D=8cm(distance of the object from the lens)
d=4cm(distance of the image from the lens)
-----------
h=?(height of the image)
(M - magnification)
M = H/D = h/d
H×d=D×h
h=H×d/D
h=6×4/8
h=3cm
The height of the image is 3cm.
Answer:
98.4 N
Explanation:
Given that the body weighs 800 N on earth.
Thus,
Weight = mass x acceleration due gravity
i.e W = mg
800 = m x 10
m =
= 80 kg
The mass of the body is 80 kg.
To be able to determine its weight on the planet, we have to first calculate the gravitational pull of the planet.
But,
g =
Where: G is the Newton's universal gravitation, M is the mass of the planet and r is the radius of the planet.
g =
=
= 1.2275
g = 1.23 m/
Thus,
Weight of the body on the planet = mg
= 80 x 1.23
= 98.4 N
The weight of the body on the planet is 98.4 N
Frequency has nothing to do with amplitue, although it is inversely (meaning as one increases the other decreases) related to wavelength. the greater the frequency, the shorter the wavelength, and the smaller the frequency the longer the wavelength. Since wave X has a gretaer frequency, it has a D. Shorter wavelength.
Answer:
The power radiated by the hawk is 0.452 Watt.
Explanation:
Given that,
Frequency = 50 Hz
Distance r=60 m
Level = 70 dB
We need to calculate the intensity
Using formula of intensity
Put the value into the formula
We need to calculate the power radiated by the hawk
Using formula of power
Put the value into the formula
Hence, The power radiated by the hawk is 0.452 Watt.
Answer:
Deny the patent- the machine violates the law of conservation of mass
Explanation:
Took the test